Steam-boiler



(No Model.)

H. H. SUPLEE.

STEAM BOILER.

Patented J'an.30, 1883.

TU a 0. 0 a o a o o o 0 H UNtTEn STATES PATENT FFlC E.

HENRY H. SUPLEE, OF PHILADELPHIA, PENNSYLVANIA;

STEAM-'BOVILER..

SPECIFICATION forming part of Letters Patent No. 271,541, dated January 30, 1883.

Application filed November 2-2, 1882. (No model.)

To all trhom it may concern Be it known that I, HENRY H. SUPLEE, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification, reference being had therein to the accompanying drawings. v

My invention relates to an improvement in steam-boilers; and it consists in the combination of the boiler with the upper pipes, which extend along opposite sides of the boiler, corresponding lower pipes, and suitable water tubes or pipes which connect these upper and lower pipes together, and a return-pipe which extends from the bottom of the boiler and connects with the mnd'drum.

It still further consists in the combination of the upper pipes, which extend along upon opposite sides of the boiler, corresponding lower pipes, and the intermediate connecting-tubes, the upper pipes being connected with the front of the boiler and the lower pipes being connee-ted with the rear end of the boiler, as'will be more fully described hereinafter.

The object of my invention is to increase the efficieucy and economy of steam-boilers by providingan additional heating-surface so connected to the main boiler as to improve the circulation, and at the same time provide additional capacity for the generation of steam,

Figure 1 is the side elevation of aboilerembodying my improvement,with the side of the casing removed. Fig. 2 is a plan view of the same with the top of the casing removed.

Fig. 3 is a front view of the boiler with the casing removed. Fig. 4 is a detailed view.

Are-presents the boiler, which may be of any desired shape, size, length, or construction which may be preferred, and which is inclosed in a suitable casing, B, which has an opening, U, through its front end, through which to feed the fire upon. the grate-bars D, and an opening, E, through its rear end for the escape of the products of combustion.

Connected to the front end of the boiler is the cross pipe or main G, which is here shown as being made the same length as the width of the inclosing-case of the boiler, but this main can be made of any length or size that may be preferred.

.rodextends through the cap or cover J,wh1ch closes the opening made in the front part of the main and has a nut applied to its outer end, as shown. When this nut is turned tightly into place the front end of the horizontal pipe and the cap or cover are drawn rigidly against the main. Any suitable means may be resorted to for fastening these parts together, and I do not therefore limit my invention to theprecise construction that is here shown.

Extending parallel with the boiler or below the level of the grate-bars are two horizontal pipes, U,which have their front ends supported in the casing and have their rear ends connected with the mud-drum 0. These lower pipes need not necessarily be placed so near the bottom of the inclosing frame or casing, and need not have their front ends supported by the casing itself. As is here shown, the ends are made to project through the casing and are supplied with suitable caps or covers, so that they can be cleaned out at any time. Oonnectingthese lower horizontal pipes and the upper horizontal pipes are a series of smaller pipes or watertubes, P, which are kept filled with water, and which pipes, being in direct contact with the fire upon each side of the furnace, adds very greatly to the steamproducing capacity of the boiler. The rear end of the boiler has the return-pipe R connected to it, and the lower end of this pipe is connected with the mud-drum, as shown in Figs. 1 and 3. The steam passes out through the steam-pipe S, while the feedwater passes through the pipe '1 into the muddrum. The intense heat applied to the vertical water-tubes causes them to expand, and as they expand they force the upper horizontal pipes upward. lftheso upper horizontal pipes were connected rigidly to the main, the expansion and contraction would soon either break the horizontal pipes or tear them loose from their fastening with the main. In order to prevent this the front end of the horizontal pipes are bent, as shown in Figs. 2 and 4, and united to the main byjoints of such a construction as to allow the horizontal pipes to move as upon a pivot. The bends of the front ends of the horizontal pipes act as crank or lever arms, and convert the vertical motion given the pipes into an axial motion around the center of the clamping-bolt K. These upper horizontal pipes, being connected to the main at their front ends only, are free to expand in the direction of'theirlength. Thelowerhorizontal pipes, being fastened at their rear ends only, are also free to expand in the direction of their length. When the boiler is in operation the downward current passes through the returnpipe, forward through the lower horizontal pipes, up through the water-tubesin to theupper horizontal pipes, and from these pipes into the main, and then back into the boiler again.

Having thus described my invention, 1 claim- 1. The combination of the boilerhaving' the main attached to one end, the upper and lower horizontal pipes, and the connecting watertubes, the front end of the upper pipes being bent and connected to the main in such amanner that these upper pipes can be moved vertically by the water-tubes as they expand and contract, substantially as described.

2. The combination of the boiler, the main connected thereto, the upper and lower horizontal pipes, connecting-tubes, and mud-drum, the upper horizontal pipes being connected by means of oscillatingjoints with the boiler at one end only, whereby they are allowed to expand in the direction of their length, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY H. SUPLEE. Vitnesses FRANK M. VIRGMAN,

WALTER T. GALMORE. 

